Crushing-rolls for ore, rock, and other material.



PATENTED JUNE 11, 1907.

Nth 856,559.

T. c. WALKER, JB. GRUSHING ROLLS FOR ORE, ROG-K, AND OTHER MATERIAL.

APPLICATION FILED HAY 18,1906.

4 SHEETS-SHEET 1.

TERS cm, WASHINGTON, n. c.

. PATENTED JUNE 11, 1907. T. 0. WALKER, JR. GRUSHING ROLLS FOR ORE, ROCK, AND OTHER MATERIAL.

APPLIOATION FILED MAY 18,1906.

4 SHEETSSHEET 2.

1n: NORRIJ PETERS 60., WASHINGYON, o r:v

No. 856,559. PATENTED JUNE 11, 1907. T. 0. WALKER, JR- GRUSHING ROLLS FOR ORE, ROCK, AND OTHER MATERIAL.

APPLICATION FILED MAY 18,1906.

4BHEBTS-SHEBT 3.

.WWWWQ Ill/III PATENTED JUNE 11, 1907.

T. c. WALKER, JR. GRUSHING ROLLS FOR ORE, ROCK, AND OTHER MATERIAL.

APPLIOATION FILED HAY 18.1906.

THOMAS C. WVALKER, JR,

OF DENVER, COLORADO.

CRU SHING-ROLLS FOR ORE, ROCK, AND OTHER MATERIAL.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed May 18,1906. Serial No. 317,650.

To all whom it may concern.-

Be it known that I, Tnouxs O. WALKER, J r., a citizen of the United States of America, residing at the city and county of Denver, and State of Colorado, have invented new and useful Crushing-Rolls for Ore, Rock, and other Material, of which the following is a specification.

My invention relates to improvements in crushing rolls for ore, rock, and other material, and the objects of my invention are: First, to provide a pair of crushing rolls, in which a new device is provided for taking the lateral thrust of the rolls. Second, to provide a housing for the buffer springs that will prevent accidents to attendants from flying pieces of springs should they break. Third, to provide an adjustable roll carrying saddle, having a depending hood portion that partially envelops the lower portion. of the roll, and that is slidably mounted on guideways, and that is adjustably connected to said buffer springs in such a manner that a predetermined adjustment of the roll to the desired crushing mesh does not interfere with the resilient buffing tension given the buffer springs. And fourth, to provide a roll adjusting and supporting saddle that is pro vided with means for shedding the ore from the shafts journal boxes, that falls at the sides of the rolls.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1, is a side elevation of the improved crushing rolls, one of the buffer spring housings being shown in section. Fig. 2, is a plan view thereof, the roller housing being removed, and the boxes of the roller shafts being shown in section. Fig. 3, is a vertical, transverse, sectional view of the machine, on the line 33 of Fig. 1. Fig. 4, is a vertical, transverse, sectional view, on the line 44 of Fig. 1. Fig. 5, is an end view of one of the crushing rolls. Fig. 6, is a vertical, transverse sectional view taken centrally through the roll. Fig. 7, is a perspective view of the sliding saddle having bearings for the movable roll. Fig. 8, is a side view of one of the side plates forming the roller housing. Fig.

9, is a side view of one of the wear plates. And Fig. 10, is a vertical sectional view thereof.

Similar letters of reference refer to similar parts throughout the several views.

. strains of the movable roll.

Referring to the drawings, the numeral 1, designates the frame of my improved rolls. This frame is a heavy substantially box girder shaped frame, and is crossed. by cross ribs 2, that extend from side to side along its sides, and by both cross ribs 2 and longitudinal ribs 3 at its ends, the end trusses being especially arranged to resist the severe abutment At one end, the frame is carried up a little higher than the opposite end, to. form an abutment for the boxes 4, of the fixed roller. These boxes are formed with their cap faces that are closest to the adjacent end of the frame, raised a short distance above the center of the box, while the joint on the opposite side of the box is formed the same distance below the center of the box that.the outside joint is above it. This construction provides a box that contains a full semi-circle of integral metal that is in alinement with the backward thrust of the fixed roll; consequently, the outside of the box forms a solid abutment above the center of its axis to the thrust of the fixed roll, whereas if the box and cap met on the horizontal center axis of the box and shaft of the roll, the cap and its connecting cap-screws would receive a part of th1s thrust, and the bearing would not be as strong and rigid as when the box is carried upat its outside to encircle the shaft high enough to receive all of the thrust itself inde pendent of the cap.

On the opposite end of the frame at its opposite corner portions, I form two projecting circular lugs 5 and 6, which form housing hoods, and in them I place buil'er springs 7 and S, the spring 7 being made to fit loosely but to '[ill the interior of the hoods, and the spring 8, being made to lit loosely within the spring 7. The spring holding aperture in the hood extends into it from the inside of the frame. Their outside ends are closed, and provided with an axial aperture 9, through which bolts 10, extend loosely, their heads 11 hearing against the end of the hood. The opposite end of each bolt is threaded close to the builer springs, and a butler plate 12, is loosely mounted on the bolt and bears against the springs. Two nuts 13 and 14:, are threaded to the bolt, and screw against the buffer plate. The extreme ends of these bolts extend through lugs 14A, formed on the opposite sides of a sliding saddle 15, and on each side of the lug jam nuts 15A, and checknuts 15B, are threaded to the bolt, and are screwed against the lug. This saddle comprises a casting that extends across the frame and fits slideways 16 and 17, which are formed on the opposite side of the frame throughout a portion of its length, and consist of a projecting lip on opposite sides of the frame, which are finished on their tops and edges and under sides, and with their edges parallel with each other. The outside edges of the saddle are also finished to register 011 and over the edges of the lips, and gibs 18, are secured to its guides that fit up against the under side of the lips of the frame. The guideway is fitted to the slideway to make an easy sliding fit. This saddle is provided with two journal boxes 19, which are formed on its inner end opposite each other with their axial centers parallel with the axial centers of the boxes 4, of the fixed roll. These boxes also are arranged with their farthest side from the crushing surfaces of the rolls raised at a sufficient distance above the horizontal center of the boxes to present an integral solid box to the thrust of the roller,while the boxes at their sides nearest to the crushing faces of the rolls are terminated at a corresponding distance below the center .of the boxes. The caps 20, of these boxes, are formed with the sides nearest the crushing faces of the rolls longest, and the opposite sides shortest. The caps of all four boxes are secured to the boxes by cap-screws 21, and under the head of each cap-screw I place a lock nut 22, preferably using the type of lock-nut known as the national nut lock. The boxes 19, are formed on the opposite 'side portions of the saddle over their guideways, and between them a depending hood 23, is formed, that partially encircles the lower rear portion of the movable roller.

In the boxes 4 and 19, I mount shafts 24, and each shaft has formed integral with it a crushing ring core 26. This crushing ring core is positioned on each shaft intermediate of its ends, and fits between the boxes. One end of each shaft projects beyond its respective boxes a short distance, but the shafts are arranged in reverse order, with their short ends on opposite sides of the frame, while their opposite ends project far enough from the boxes, also'in an opposite direction from the frame, to receive driving pulleys 26A. Each journal box cap, is provided centrally of its length with a raised annular band portion 28, and a circumferential recess 29 is formed inside of each cap and box, and on the shaft centrally within each box a wedgeshaped collar 30, is formed, the opposite sides of which taper equally from the shaft to its periphery. This collar is positioned inside of the annular band of the boxes, and when the boxes are babbitted the Babbittmetal surrounds the collar, forming a tapering circumferential groove in each box in which the collars rotate. These collars hold the shaft .and rolls immovable against lateral thrust strains, and pressure, which are very severe when crushing hard ore. The tops of the boxes are provided with oil chambers 31, which are filled with waste and oil, and are closed by covers 32; the Babbitt lining of the boxes is also channeled with oil grooves, arranged to distribute the oil evenly throughout them. i

On each sh aft on Opposite sides of the cores and between each core and its boxes, 1 form collars 33, which are positioned under the opposite side edges of the roll incasing housing. These collars are provided With rounded peripheral edges, which shed the ore that falls over the side edges of the rolls, and drops between the rolls and the frame, away from the boxes; consequently dust, grit, and finely pulverized ore, falling on the shafts, can not work along the shafts into the boxes. Housings 34, rest on the frame, so as to inclose the rollers, and are bolted to the frame by bolts 36, at the center, and at the fixed roll end, but rest on a flange 37, on the sliding saddle. A hopper entrance is located at the top of the housings centrally between the crushing faces of the rolls. The

housings are entirely open over the rolls, and are provided with flexible covers 39 and 40, which are bolted at their upper ends to cross strips 41, adjacent to the hopper opening. The lower end reaches to the cross ends of the frame and saddle, and 1s loose, but owing to the flexibility of these rubber covers they lie down tight against the curvature of the housing. Within the hopper, and against the sides of the hopper, I securely bolt side abutment and wearing lates 43, by bolts 44, which are formed and adapted to take the wear of the falling ore at the sides of the rolls. The bolt heads of the securing bolts 44, are counter-sunk into the plates on the inside, and an over-hanging lip 45, is provided at their to s that loops over on top of the opposite si e of the housing. The peripheral faces of the crushing ring cores, is made tapering, and the inner peripheral bore of the crushing rings 46 are tapered to fit tightly on them, and they are secured to the cores by draw bolts 47.

The operation of ore and rock crushing rolls, is so well understood that a description of it is unnecessary, except to say that by means of the adj ustability of the buffer spring bolts, the crushing roll faces can be adjusted to run in bearing contact with each other, or at any predetermined distance apart, by adjusting the nuts 15A and 15B, and the sliding roll will resiliently yield and give, as

the ore is fed to the rolls, or if any hard bumps or any piece of metal should accidentally be fed to them. Inde endently of the adjustment of the tension 0 the housed bufier springs, which act to resiliently cushion the yielding pressure of the sliding roll, and as this sliding roll is mounted on a saddle slidingly mounted on finished parallel guideways, the sliding roll in yielding away from the fixed roll, always moves in a parallel line away and toward the fixed roll. The taper abutment collars on the shaft revent any lateral movement of either rol l and thus prevent channeling of the rolls, and hold them in perfect alinement with each other.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In crushing rolls, the combination of a girder box frame, having a guideway, a fixed roll, a saddle slidably mounted in said frame and guideway, an adjustable resilient buffer devicefor said saddle, and a roll mounted in said saddle in crushing relation to said fixed roll, with shafts forming a part of said rolls and provided with journal collars, journal boxes adapted to support said shafts, recesses in said boxes ada ted to receive the journal collars of said shafts, and a lining of Babbitt metal in said boxes and recesses around said shafts and their journal collars, as specified.

2. In crushing rolls, the combination with the frame and the sliding saddle, journal boxes on said frame and saddle, a raised band portion on the central portion of each of said boxes, a circumferential recess in each box within said bands, a roll carrying shaft babbitted in each pair of boxes, and a tapering collar on each shaft babbitted in the recess of each band, as specified.

3. In crushing rolls, the combination with the frame, the saddle slidably mounted thereon and provided with a resilient buffer device, and journal boxes on said frame and saddle, rovided with circun'iferential recesses, ol' the shafts and crushing rolls journaled in said journal boxes, the tapering wedge-shaped collars on said shafts extending into said circumferential recesses, said recesses acting as abutments for said collars and being adapted to prevent lateral thrust of said rolls and shafts, a housing surrounding the sides of said rolls and collars on each side of each roll under said housing arranged and adapted to prevent material falling from said rolls from working to and into said journal boxes, as specified In testimony whereof I allix my signature in presence of two witnesses.

THOMAS (J. WALKER, JR.

Witnesses:

G. SARGENT ELLIOTT, ADELLA M. FowLn. 

